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665 lines
22 KiB
665 lines
22 KiB
#line 1 "manyicmp.c"
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//================================================================================
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// Microsoft Confidential
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// Copyright (C) Microsoft Corporation 1997
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//
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// Author: RameshV
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//================================================================================
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//================================================================================
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// Required headers
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//================================================================================
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#include "inc.h"
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#pragma hdrstop
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#include <ipexport.h>
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#include <icmpif.h>
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#include <icmpapi.h>
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#include <winsock.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <align.h>
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#include <adt.h>
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#include "adt.c"
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//================================================================================
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// Required function, IMPORTED
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//================================================================================
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VOID
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HandleIcmpResult( // Handle a processed ICMP packet.
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IPAddr DestAddr, // Attempted dest address
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BOOL Status, // Non-zero=> Dest reachable
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LPVOID Context // Whatever was passed to DoIcmpRe..
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);
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//================================================================================
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// Functions EXPORTED
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//================================================================================
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DWORD // Win32 errors
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DoIcmpRequest( // send icmp req. and process asynchro..
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IPAddr DestAddr, // Address to send ping to
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LPVOID Context // the parameter to above function..
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);
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DWORD // Win32 errors
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PingInit( // Initialize all globals..
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VOID
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);
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VOID
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PingCleanup( // Free memory and close handles..
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VOID
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);
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//================================================================================
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// Some defines
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//================================================================================
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#define PING_TEST // Yes, we are testing PING.
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#define WAIT_TIME 5000
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#define RCV_BUF_SIZE 0x2000
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#define SEND_MESSAGE "IcmpDhcpTest"
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#define THREAD_KILL_TIME INFINITE
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#define MAX_PENDING_REQUESTS 100
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#define NUM_RETRIES 3
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#if DBG
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#define DhcpAssert(Condition) do{ \
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if(!(Condition)) AssertFailed(#Condition, __FILE__, __LINE__); } \
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while(0)
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#define ErrorPrint printf
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#else
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#define DhcpAssert(Condition)
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#define ErrorPrint (void)
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#endif
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//================================================================================
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// Data structures NOT EXPORTED
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//================================================================================
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// The follwing is the structure that is passed back to the callback function
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typedef struct st_apcContext { // struct passed to APC routine
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LIST_ENTRY IcmpRepliesList; // the chain of replies got is stored here
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LIST_ENTRY IcmpRequestsList; // The list that holds the icmp response
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PICMP_ECHO_REPLY Reply; // Icmp reply packet
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DWORD ReplySize; // The size of above buffer.
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IPAddr DestinationAddress; // Who are we try to ping?
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DWORD Status; // Did we succeed? Also retry count.
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LPVOID Context; // Dont know what this is goint to be
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} APC_CONTEXT, *PAPC_CONTEXT;
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// All globals are here.
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LIST_ENTRY IcmpRepliesList; // Here is where the IcmpReplies are spooled
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LIST_ENTRY IcmpRequestsList; // Here is where the
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CRITICAL_SECTION IcmpRepliesCritSect; // To access the replies list
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CRITICAL_SECTION IcmpRequestsCritSect; // To access the requests list
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HANDLE IcmpRepliesEvent; // Signaled each time a reply is received
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HANDLE IcmpRequestsEvent; // Singaled whenever a request is received
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HANDLE TerminateEvent; // Quit everything being done.
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CRITICAL_SECTION OutputCritSect; // To co-ordinate access to console output
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HANDLE RequestsThreadHandle; // The handle of the thread that takes requests
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HANDLE RepliesThreadHandle; // The handle of the thread that takes replies
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HANDLE IcmpHandle; // Handle to do IcmpSendEcho2 etc.
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PRODCONS IcmpProdConsSynchObj; // Producer/Consumer synchro.. object
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BOOL Terminating = FALSE; // Are we terminating?
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#define LOCK_REPLIES_LIST() EnterCriticalSection(&IcmpRepliesCritSect)
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#define LOCK_REQUESTS_LIST() EnterCriticalSection(&IcmpRequestsCritSect)
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#define LOCK_OUTPUT() EnterCriticalSection(&OutputCritSect)
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#define UNLOCK_REPLIES_LIST() LeaveCriticalSection(&IcmpRepliesCritSect)
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#define UNLOCK_REQUESTS_LIST() LeaveCriticalSection(&IcmpRequestsCritSect)
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#define UNLOCK_OUTPUT() LeaveCriticalSection(&OutputCritSect)
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//================================================================================
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// Assertion failure routine + allocation free routines
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//================================================================================
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VOID static _inline
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AssertFailed(
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LPSTR Condition,
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LPSTR File,
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DWORD Line
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) {
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BYTE Buf[1000];
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DWORD RetVal;
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sprintf(Buf, "[%s:%d] %s", File, Line, Condition);
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RetVal = MessageBox(
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NULL, // hWnd: NULL => default desktop
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Buf, // Text to print
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"Assertion Failure", // Window caption
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MB_OK | MB_ICONSTOP // Message type
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);
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}
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LPVOID _inline
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DhcpAllocateMemory(
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DWORD Size
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) {
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return LocalAlloc(LMEM_FIXED, Size);
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}
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VOID _inline
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DhcpFreeMemory(
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LPVOID Ptr
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) {
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LocalFree(Ptr);
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}
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//================================================================================
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// Routines
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//================================================================================
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//--------------------------------------------------------------------------------
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// The following functions are on the replies side. They handle the icmp reply
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// packet and take the necessary action depending on the status, etc.
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//--------------------------------------------------------------------------------
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VOID static
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ApcRoutine( // This is called when ping completes
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IN PVOID Context, // The above structure
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IN PIO_STATUS_BLOCK Ignored1, // Unused param
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IN ULONG Ignored2 // Unused param
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) {
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BOOL Status;
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PAPC_CONTEXT ApcContext = (PAPC_CONTEXT)Context;
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if( TRUE == Terminating ) {
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// Just free memory and quit?
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ASSERT( FALSE );
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DhcpFreeMemory(ApcContext);
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return;
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}
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// All we have to do is add it to the Replies List and signal the event
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LOCK_REPLIES_LIST();
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InsertTailList(&IcmpRepliesList, &ApcContext->IcmpRepliesList);
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UNLOCK_REPLIES_LIST();
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Status = SetEvent(IcmpRepliesEvent);
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ASSERT( FALSE != Status );
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}
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// The following function decides if the Destination is reachable or not.
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BOOL static
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DestReachable( // Is destination reachable?
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IN PAPC_CONTEXT ApcContext // this has the info of sender etc..
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) {
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DWORD nReplies, i;
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// First parse the packet.
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nReplies = IcmpParseReplies(ApcContext->Reply, ApcContext->ReplySize);
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// if no replies, then straight assume that destination is unreachable.
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if( 0 == nReplies ) {
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// If there was no reply, there is no way for us to reach this
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// So, we assume that the Dest is NOT reachable.
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// Reasons could be IP_REQ_TIMED_OUT or IP_BAD_DESTINATION etc..
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return FALSE;
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}
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// Now we check each reply to see if there is anything from the same dest
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// address we are looking for. And if the status is success. If the status
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// is not success, we actually do not check anything there. Potentially, it
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// could be IP_DEST_PORT_UNREACHABLE, in which case, the dest machine is up,
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// but for some reason we tried the wrong port..
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for( i = 0; i < nReplies; i ++ ) {
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if( ApcContext->DestinationAddress == ApcContext->Reply[i].Address ) {
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// hit the destination!
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ASSERT( IP_SUCCESS == ApcContext->Reply[i].Status );
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return TRUE;
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}
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ASSERT( IP_SUCCESS != ApcContext->Reply[i].Status);
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}
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// None of the replies were successful.
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return FALSE;
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}
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VOID static
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HandleRepliesEvent( // Process all replies received
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VOID
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) {
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PAPC_CONTEXT ApcContext;
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PLIST_ENTRY listEntry;
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BOOL Status;
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LOCK_REPLIES_LIST();
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while( !IsListEmpty( &IcmpRepliesList ) ) {
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// retrive the first element in the list
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ApcContext = CONTAINING_RECORD(IcmpRepliesList.Flink, APC_CONTEXT, IcmpRepliesList);
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RemoveEntryList(&ApcContext->IcmpRepliesList);
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UNLOCK_REPLIES_LIST();
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Status = DestReachable(ApcContext);
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if( Status || NUM_RETRIES <= ApcContext->Status ) {
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StartConsumer(&IcmpProdConsSynchObj);
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HandleIcmpResult(
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ApcContext->DestinationAddress,
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Status,
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ApcContext->Context
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);
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DhcpFreeMemory(ApcContext);
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EndConsumer(&IcmpProdConsSynchObj);
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} else {
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// retry
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LOCK_REQUESTS_LIST();
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InsertTailList(&IcmpRequestsList, &ApcContext->IcmpRequestsList);
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UNLOCK_REQUESTS_LIST();
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Status = SetEvent(IcmpRequestsEvent);
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ASSERT( TRUE == Status );
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}
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LOCK_REPLIES_LIST();
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}
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UNLOCK_REPLIES_LIST();
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}
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// This routine sleeps on a loop, and is woken up by the call back function when an ICMP
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// reply comes through. On waking up, this routine processes ALL ICMP replies.
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DWORD static // THREAD ENTRY
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LoopOnIcmpReplies( // Loop on all the ICMP replies.
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LPVOID Unused
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) {
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DWORD Status;
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HANDLE WaitHandles[2];
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WaitHandles[0] = TerminateEvent;
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WaitHandles[1] = IcmpRepliesEvent;
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while( TRUE ) {
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Status = WaitForMultipleObjects(
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sizeof(WaitHandles)/sizeof(WaitHandles[0]),
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WaitHandles,
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FALSE,
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INFINITE
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);
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if( WAIT_OBJECT_0 == Status ) break; // Termination
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if( 1+WAIT_OBJECT_0 == Status ) {
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HandleRepliesEvent();
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continue;
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}
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ASSERT( FALSE );
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}
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return ERROR_SUCCESS;
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}
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#define AlignSizeof(X) ROUND_UP_COUNT(sizeof(X),ALIGN_WORST)
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DWORD // exported
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DoIcmpRequest(
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IPAddr DestAddr,
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LPVOID Context
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) {
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PAPC_CONTEXT pCtxt;
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LPBYTE startAddress;
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DWORD Status;
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BOOL BoolStatus;
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// Create the context
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pCtxt = DhcpAllocateMemory(AlignSizeof(APC_CONTEXT) + RCV_BUF_SIZE);
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startAddress = (LPBYTE)pCtxt;
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if( NULL == pCtxt ) return GetLastError();
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// Now fill the context with all that we know.
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pCtxt->Reply = (PICMP_ECHO_REPLY)(startAddress + AlignSizeof(APC_CONTEXT));
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pCtxt->ReplySize = RCV_BUF_SIZE;
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pCtxt->DestinationAddress = DestAddr;
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pCtxt->Status = 0;
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pCtxt->Context = Context;
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// enqueue this guy.
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StartProducer(&IcmpProdConsSynchObj);
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LOCK_REQUESTS_LIST();
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InsertTailList(&IcmpRequestsList, &pCtxt->IcmpRequestsList);
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UNLOCK_REQUESTS_LIST();
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EndProducer(&IcmpProdConsSynchObj);
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// Signal the Requests loop.
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BoolStatus = SetEvent(IcmpRequestsEvent);
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ASSERT( TRUE == BoolStatus );
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return ERROR_SUCCESS;
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}
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//--------------------------------------------------------------------------------
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// The following functions handle the the end that sends ICMP echoes.
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//--------------------------------------------------------------------------------
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VOID static
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HandleRequestsEvent( // Process every request for ICMP echo.
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VOID
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) {
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PAPC_CONTEXT ApcContext;
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PLIST_ENTRY listEntry;
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DWORD Status;
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LOCK_REQUESTS_LIST();
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while( !IsListEmpty( &IcmpRequestsList ) ) {
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// retrive the first element in the list
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ApcContext = CONTAINING_RECORD(IcmpRequestsList.Flink, APC_CONTEXT, IcmpRequestsList);
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RemoveEntryList(&ApcContext->IcmpRequestsList);
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UNLOCK_REQUESTS_LIST();
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// Send an Icmp echo and return immediately..
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ApcContext->Status ++;
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Status = IcmpSendEcho2(
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IcmpHandle, // The handle to register APC and send echo
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NULL, // No event
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ApcRoutine, // The call back routine
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(LPVOID)ApcContext, // The first parameter to the callback routine
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ApcContext->DestinationAddress, // The address being PING'ed
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SEND_MESSAGE,
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(WORD)strlen(SEND_MESSAGE),
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NULL,
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(LPVOID)ApcContext->Reply,
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ApcContext->ReplySize,
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WAIT_TIME
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);
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if( FALSE == Status ) Status = GetLastError();
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else Status = ERROR_SUCCESS;
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// Since we queued an APC, we expect an STATUS_PENDING.
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if( ERROR_SUCCESS != Status && ERROR_IO_PENDING != Status ) {
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ASSERT(FALSE);
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LOCK_OUTPUT();
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ErrorPrint("IcmpSendEcho2:GetLastError: %d\n", Status);
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UNLOCK_OUTPUT();
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}
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LOCK_REQUESTS_LIST();
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}
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UNLOCK_REQUESTS_LIST();
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}
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// This function handles the Requests.. For each one, it just sends an IcmpEcho
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// asynchronously and returns back immediately. When the APC routine is called,
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// it would queue it up on the Replies list and then it would get processed...
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DWORD static // THREAD ENTRY
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LoopOnIcmpRequests( // Process pending requests for echo
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LPVOID Unused
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) {
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DWORD Status;
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HANDLE WaitHandles[2];
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WaitHandles[0] = TerminateEvent;
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WaitHandles[1] = IcmpRequestsEvent;
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while( TRUE ) {
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Status = WaitForMultipleObjectsEx(
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sizeof(WaitHandles)/sizeof(WaitHandles[0]), // # of handles
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WaitHandles, // array of handles
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FALSE, // any one of them set
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INFINITE, // wait forever
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TRUE // allow APC's
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);
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if( WAIT_OBJECT_0 == Status ) break; // Termination
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if( WAIT_IO_COMPLETION == Status) continue;
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if( 1+WAIT_OBJECT_0 == Status ) {
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HandleRequestsEvent();
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continue;
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}
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ASSERT(FALSE);
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}
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return ERROR_SUCCESS;
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}
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//--------------------------------------------------------------------------------
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// Initialization, Cleanup routines.
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//--------------------------------------------------------------------------------
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DWORD // exported
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PingInit(
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VOID
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) {
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DWORD ThreadId, Status;
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// Initialize all data vars.
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IcmpRepliesEvent = IcmpRequestsEvent = TerminateEvent = NULL;
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RepliesThreadHandle = RequestsThreadHandle = NULL;
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IcmpHandle = NULL;
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// Open IcmpHandle..
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IcmpHandle = IcmpCreateFile();
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if( NULL == IcmpHandle ) return GetLastError();
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// Initialize Lists.
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InitializeListHead(&IcmpRepliesList);
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InitializeListHead(&IcmpRequestsList);
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// Initialize Critical Sections.
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InitializeCriticalSection(&IcmpRepliesCritSect);
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InitializeCriticalSection(&IcmpRequestsCritSect);
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InitializeCriticalSection(&OutputCritSect);
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// Create Events,
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IcmpRepliesEvent = CreateEvent( NULL, FALSE, FALSE, NULL );
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if( NULL == IcmpRepliesEvent ) return GetLastError();
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IcmpRequestsEvent = CreateEvent( NULL, FALSE, FALSE, NULL );
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if( NULL == IcmpRequestsEvent ) return GetLastError();
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TerminateEvent = CreateEvent( NULL, TRUE, FALSE, NULL );
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if( NULL == TerminateEvent ) return GetLastError();
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// Create producer-consumer synchronization object
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Status = InitializeProducerConsumer(
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&IcmpProdConsSynchObj,
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MAX_PENDING_REQUESTS,
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MAX_PENDING_REQUESTS
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);
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if( ERROR_SUCCESS != Status ) return Status;
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// Create Threads
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RepliesThreadHandle = CreateThread(
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(LPSECURITY_ATTRIBUTES)
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NULL, // No security information
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0, // Stack size = same as default primary thread
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LoopOnIcmpReplies, // The function to call
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NULL, // No paramter needs to be passed to this function
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0, // Flags: just start this thread right away
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&ThreadId // The return ThreadId value.
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);
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if( NULL == RepliesThreadHandle ) return GetLastError();
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RequestsThreadHandle = CreateThread(
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NULL, // No security information
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0, // Stack size = same as default primary thread
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LoopOnIcmpRequests, // The function to call
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NULL, // No paramter needs to be passed to this function
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0, // Flags: just start this thread right away
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&ThreadId // The return ThreadId value.
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);
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if( NULL == RequestsThreadHandle ) return GetLastError();
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return ERROR_SUCCESS;
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}
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VOID // exported
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PingCleanup(
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VOID
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) {
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DWORD Status;
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BOOL BoolStatus;
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PAPC_CONTEXT ApcContext;
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PLIST_ENTRY listEntry;
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// Kill the replies and reqeusts threads after waiting for a while.
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// Kill the Replies and Requests ThreadHandle 's.
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if( NULL != RepliesThreadHandle || NULL != RequestsThreadHandle ) {
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// ASSERT ( NULL != TerminateEvent )
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Terminating = TRUE;
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SetEvent(TerminateEvent);
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if( NULL != RepliesThreadHandle ) {
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Status = WaitForSingleObject(
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RepliesThreadHandle,
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THREAD_KILL_TIME
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);
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if( WAIT_OBJECT_0 != Status ) {
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// did not succeed in stopping the thread..
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BoolStatus = TerminateThread(
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RepliesThreadHandle,
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0xFF
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);
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ASSERT(BoolStatus);
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}
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CloseHandle(RepliesThreadHandle);
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}
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if( NULL != RequestsThreadHandle ) {
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Status = WaitForSingleObject(
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RequestsThreadHandle,
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THREAD_KILL_TIME
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);
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if( WAIT_OBJECT_0 != Status ) {
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// did not succeed in stopping the thread..
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BoolStatus = TerminateThread(
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RequestsThreadHandle,
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0xFF
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);
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ASSERT(BoolStatus);
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}
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CloseHandle(RequestsThreadHandle);
|
|
}
|
|
}
|
|
|
|
// Close Event handles.
|
|
CloseHandle(IcmpRepliesEvent);
|
|
CloseHandle(IcmpRequestsEvent);
|
|
CloseHandle(TerminateEvent);
|
|
|
|
// Destroy producer consumer synchronization object
|
|
DestroyProducerConsumer(&IcmpProdConsSynchObj);
|
|
|
|
// Freeup all elements of lists..
|
|
while( !IsListEmpty( &IcmpRepliesList ) ) {
|
|
// retrive the first element in the list
|
|
ApcContext = CONTAINING_RECORD(IcmpRepliesList.Flink, APC_CONTEXT, IcmpRepliesList);
|
|
RemoveEntryList(&ApcContext->IcmpRepliesList);
|
|
|
|
DhcpFreeMemory(ApcContext);
|
|
}
|
|
while( !IsListEmpty( &IcmpRequestsList ) ) {
|
|
// retrive the first element in the list
|
|
ApcContext = CONTAINING_RECORD(IcmpRequestsList.Flink, APC_CONTEXT, IcmpRequestsList);
|
|
RemoveEntryList(&ApcContext->IcmpRequestsList);
|
|
|
|
DhcpFreeMemory(ApcContext);
|
|
}
|
|
|
|
// Close Icmp handle
|
|
CloseHandle(IcmpHandle);
|
|
|
|
// Destroy critical sections
|
|
DeleteCriticalSection(&IcmpRepliesCritSect);
|
|
DeleteCriticalSection(&IcmpRequestsCritSect);
|
|
DeleteCriticalSection(&OutputCritSect);
|
|
}
|
|
|
|
#ifdef PING_TEST
|
|
//--------------------------------------------------------------------------------
|
|
// Test module. This exercises the above functions.
|
|
//--------------------------------------------------------------------------------
|
|
DWORD SA, EA;
|
|
DWORD
|
|
TestPing(
|
|
LPSTR StartAddrString,
|
|
LPSTR EndAddrString
|
|
) {
|
|
IPAddr i, StartAddr, EndAddr;
|
|
DWORD Status;
|
|
BOOL BoolStatus;
|
|
HANDLE ThreadHandle;
|
|
|
|
StartAddr = SA = inet_addr(StartAddrString);
|
|
EndAddr = EA = inet_addr(EndAddrString);
|
|
|
|
Status = PingInit();
|
|
if( ERROR_SUCCESS != Status ) return Status;
|
|
|
|
for( i = htonl(StartAddr); i <= htonl(EndAddr); i ++ ) {
|
|
|
|
Status = DoIcmpRequest(ntohl(i), NULL);
|
|
ASSERT( ERROR_SUCCESS == Status );
|
|
}
|
|
|
|
LOCK_OUTPUT();
|
|
printf("Done\n");
|
|
UNLOCK_OUTPUT();
|
|
|
|
// Sleep for a while and then signal termination...
|
|
Sleep(30000);
|
|
// Give the threads time to die?
|
|
PingCleanup();
|
|
return ERROR_SUCCESS;
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------
|
|
// Main function. Just does the test routine.
|
|
//--------------------------------------------------------------------------------
|
|
VOID _cdecl
|
|
main(
|
|
int argc,
|
|
char *argv[]
|
|
) {
|
|
DWORD Status;
|
|
if( argc != 3 ) {
|
|
fprintf(stderr, "\nUsage: %s start-ip-addr end-ip-addr\n", argv[0]);
|
|
exit(1);
|
|
}
|
|
|
|
Status = TestPing(argv[1], argv[2]);
|
|
if( ERROR_SUCCESS != Status ) {
|
|
fprintf(stderr, "Error: %d\n", Status);
|
|
}
|
|
}
|
|
#endif PING_TEST
|
|
|
|
//--------------------------------------------------------------------------------
|
|
// End of file.
|
|
//--------------------------------------------------------------------------------
|
|
|
|
// This will really be defined elsewhere.. until then.
|
|
VOID
|
|
HandleIcmpResult( // Handle a processed ICMP packet.
|
|
IPAddr DestAddr, // Attempted dest address
|
|
BOOL Status, // Non-zero=> Dest reachable
|
|
LPVOID Context // Whatever was passed to DoIcmpRe..
|
|
) {
|
|
|
|
LOCK_OUTPUT();
|
|
printf("Ping[%s] does %s exist\n",
|
|
inet_ntoa(*(struct in_addr *)&DestAddr),
|
|
Status? "" : "not" );
|
|
UNLOCK_OUTPUT();
|
|
}
|